Domino Cyclization/Electrocyclization/Elimination Reactions of Arylacetonitriles with N,N′‐Bis(1‐naphthyl)oxaldiimidoyl Dichlorides: Efficient Synthesis of Fluorescent 15H‐Benzo[h]benzo[6,7]indolo[3,2‐b]quinolines.

Abstract

benzo[6,7]indolo[3,2-b]quinolines. -The domino cyclization/electrocyclization/elimination reaction between the oxaldiimidoyl chloride (IV) and the cyanides (V) allows a convenient synthesis of the title compounds (VI). They can be regarded as hexacyclic δ-carbolines and are novel fluorescent dyes. The two-step synthesis via (VII) gives lower yields. -(ANDERS, J. T.; LANGER*, P.; Eur.